Long time lurker here, not connected with aviation in any way except that many of you guys fly over my head every few minutes (if the wind is at all Westerly).
I find this thread, and the previous one started I think by "120.4", intensely interesting because I'm down here looking at you up there (and for the last few months listening to everyone on 119.72, 120.4 etc) and we London folk rather rely on you all not to bang your ally tubes together over our manor. And an excellent job you all on the ground and in the air do, to that end, thank you very much.
You may find it informative to see what BAA think is happening on the London approaches; for LHR see:
http://lhr.webtrak-lochard.com/template/index.html
Is this an accurate picture of how it really is?